I'm working on my first x-kilt and I need some advice from those that have gone before. How wide is the under appron pleat. The instructions (2nd ed) show a 12 inch Under Apron Pleat (the BIG pleat) with a 10 inch Over Apron in the appendix 1. I have a 15.5 apron. Do I still use the 12 inch pleat or do I need a 17.5 inch. My confusion is that 12 is 2 over the 10 inch over apron in the diagram. Using a 15.5 inch over apron would make that 17.5 but that sound wrong. The under apron pleat seems to be the only measurement I can not find explained.
Thank you,